I've bought a lot of 3X3 and now I have too much stikers left in my stikers box
one day I was suffering the internet and I found something wrong with my keyboard.....(my laptop is acer 4830TG)
yes It's looks like a stiker= =
then you will see something like this.....
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you need two sets of stikers for 3X3

and a pen knife.....a tweezers
so.....

this is my current progress....arrow keys and F1-F12 are so small so I can't use a normal 3x3 stikers....
you may ask if it will make it hard to use.......
that won't be a problem if you don't have to look at the keyboard while typing letters=.=
hope you make yours and post it out~